Malicious PDF — malware analysis report

Static analysis result for SHA-256 0032b18f32cbeb71…

MALICIOUS

PDF

79.9 KB Created: 2021-06-11 16:22:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ad7afc435f16ebdf906e310ca6b6f76e SHA-1: adddb7da2aa23808705e496b517a041def313c8a SHA-256: 0032b18f32cbeb7117e4e5efc2a9155ec9fa01b05f16d4fab38fe7f35763c6e2
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application T1203 Exploitation for Client Execution

The file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links to external hosting sites, suggesting a link farm designed to obscure the ultimate malicious destination. The primary lure appears to be related to a '7th grade genetics test' or a prize, which is a common tactic for advance-fee fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pistant.ru/pbw?utm_term=7th+grade+genetics+test PDF link annotation
    • https://jasuxazej.weebly.com/uploads/1/3/4/8/134875243/vijegomepila.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383137/normal_603db5ff3378c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472793/normal_602645aeb4044.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414678/normal_60524cd8edf66.pdfIn PDF document text
    • https://nigefawami.weebly.com/uploads/1/3/4/5/134598638/2982261.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412591/normal_5fd7ad2123353.pdfIn PDF document text
    • https://rivotajelu.weebly.com/uploads/1/3/4/3/134377742/4624566.pdfIn PDF document text
    • https://gijifapezikad.weebly.com/uploads/1/3/4/6/134644128/vozuz.pdfIn PDF document text
    • https://fazodokivev.weebly.com/uploads/1/3/4/0/134018208/8a56f1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca579b4d-8b2d-48f4-95f6-a544366bc479/34231971353.pdfIn PDF document text
    • http://fokojifidesi.pbworks.com/f/18691656091.pdfIn PDF document text
    • http://xewubamefa.pbworks.com/w/file/fetch/144661866/handbook_of_nonprescription_drugs_19th_edition_download_free.pdfIn PDF document text
    • http://milatufed.pbworks.com/w/file/fetch/144955998/5623067353.pdfIn PDF document text
    • http://lokiboz.pbworks.com/w/file/fetch/144903930/bilixovumesezakemasazepo.pdfIn PDF document text
    • http://podixarutib.pbworks.com/w/file/fetch/144657738/lelinivikepesusivaxavi.pdfIn PDF document text
    • http://serizedez.pbworks.com/f/unified_school_district.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/771fff0a-5122-497e-99e6-bd4cbd8499e2/lecturas_y_preguntas_de_comprension_lectora_para_secundaria.pdfIn PDF document text
    • http://bokibagaror.pbworks.com/f/regisakuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1cbe1c1-b960-4cb1-afa4-28e756bc465e/irobot_roomba_860_battery.pdfIn PDF document text
    • http://fagimox.pbworks.com/f/23975861944.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30002d53-ce13-4fca-b86e-135b1ce585ba/wififuwedadinibi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE615 5152 bytes
SHA-256: a0b17930f8c3199ebe31882e03387db7a933f3ec9c2281d5d77fe9a472a899bb
font_01_sfnt_off0000f793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF793 11100 bytes
SHA-256: 51620466ba501d616cc69d3900934866ff347f566c3947ee09c46b474eb72e80
font_02_sfnt_off00011d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8E 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073